Method of pouring liquid slag



Oct. 12, 1954 O. K. VORWERK METHOD OF POURING LIQUID SLAG File d Oct. 25, 1950 K MRJ E Ewp w 1% N m .m T A T K A F/ W Y NB Patented a. 12, 1954- UNITED STATES ATENT OFFICE.

Otto Karl Vorwerk,

Rheinhausen, Germany, as-

signor to Huttenwerk Rheinhausen Aktiengesellschaft,

Rheinhausen, Germany Application October 25, 1950, Serial No. 192,044

Claims priority, application December 7, 1949 2 Claims. 1

The invention relates to a method of pouring liquid slag into a foaming bed for foaming the slag by foaming means, for example, water which rises up through jets from the floor of the foaming bed.

Hitherto in the said process the slag was poured out of the slag ladle at one point of the foaming bed. Thereby lumpy accumulations of the mass formed below the stream from the pouring ladle, and this mass did not spread in the desired manner over the pouring bed, so that a uniformly fine layer was not produced over the foaming pouring bed, as is necessary for intended treatment of the slag with water or air. Moreover it easily happened that stiffened parts of the slag which have travelled along with the stream covered up the jets disposed on the floor of the foaming bed, so that the water or air serving for the foaming of the slag could not escape in the desired manner. It often happens that with slag delivered from the furnace into the slag ladle, that iron which has accompanied it settles down on the bottom of the slag ladle. The interaction of the iron accompanying the slag can cause explosions to occur with water.

It is an object of this invention to provide a method of pouring liquid slag into a foaming bed, which will overcome the above-mentioned drawbacks.

It is a further object of this invention to provide a method of pouring liquid slag, which will not only yield a more oven and uniform distribution of the slag in the foaming bed in which it is poured, but will also substantially prevent any congealed parts of slag and accompanying iron from entering said bed.

These and other objects and advantages of the invention will appear more clearly from the following description in connection with the accompanying drawing, which shows in a perspective view, an embodiment of a device adapted for carrying out the method according to the present invention.

Above the brick or concrete foaming bed I, on the floor of which are jets 2 for the introduction of Water or air for the foaming of the slag, a troughlike intermediate container 3 is arranged, which extends over the whole width of the foaming bed and into which the slag is conveyed by means of a pouring ladle 4. The intermediate Germany I over the length of the 2 container 3 can be tilted by means of a hand wheel 6. It rests at both ends on traveling mountings, which are displaceable along rails 1, l on the side walls of the pouring bed.

On the pouring of the molten slag from the ladle 4 into the intermediate container 3, congealed parts of the slag and iron accompanying it are held back in the ladle. Before the slag can again partially solidify, the intermediate container 3 is rapidly emptied through tilting by means of the hand wheel 6 or of a mechanical impulsion. Since the overflow edge extends over the whole width of the foaming bed, the slag is poured in a wide and fiat stream on to the bed I, so that it distributes itself well over the bed. In order to produce an even quicker distribution, the intermediate container 3 is run on the rails l, pouring bed during the foaming. The invention is however not limited to the intermediate container being displaceable in this manner, and it is also possible for the intermediate container not to extend over the whole width of the pouring bed but only over a part thereof.

Instead of tilting the intermediate container this can be rapidly emptied in any other way in a wide stream, for example by opening valves. It is also within the ambit of the invention for the slag to be conveyed to the container 3 not by means-of a pouring ladle d but for example by direct discharge perhaps in a channel from the furnace.

As to the speed of tilting of the trough 3, the speed may be regulated according to the viscosity of the slag to be poured.

It is, of course, understood that the present invention is by no means limited to the particular method described in connection with the drawing, but also comprises any modifications within the scope of the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. A method of foaming liquid slag on a substantially horizontal foaming bed which comprises; accumulating the liquid slag in a container extending substantially the entire width of the foaming bed, rapidly discharging the container and pouring the liquid slag in a fiat stream over the foaming bed and supplying a foaming agent to the liquid slag through the bottom of the bed.

2. A method of foaming liquid slag on a substantially horizontal foaming bed which comprises; accumulating the liquid slag in a container extending substantially the entire width of the foaming bed, rapidly discharging the container and pouring the liquid slag in a fiat stream over the foaming bed while moving the container in the direction of the length of the bed during the said pouring, and supplying a foaming agent to l the liquid slag through the bottom of the bed.

Name Date Thompson July 10, 1888 Number Name Date Bierer Aug. 24, 1897 Taylor Sept. 27, 1904 George et a1 June 30, 1908 Webster July 12, 1910 Hurst Jan. 3, 1922 Despret Aug. 13, 1935 Kell July 4, 1944 Gallai-Hatchard June 8, 1948 

